Accretion processes for general spherically symmetric compact objects

Bahamonde, Sebastián; Jamil, Mubasher

doi:10.1140/epjc/s10052-015-3734-9

Cited by 51 publications

(66 citation statements)

References 38 publications

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“…The value of ω represent the various models of DE such that for cosmological constant ω = 1, dust ω = 0, stiff ω = −1, phantom energy ω < −1 and quintessence −1 < ω < 1. It is noted that the behavior of velocity is similar to those reported in [41,42]. Also, we have found that velocity is positive for ω ≥ −0.5 and negative for phantom energy (ω < Figure 3 shows the rate of change of RBH mass for different value of ω.…”

Section: Nonminimal Magnetically Charged Rbhsupporting

confidence: 83%

“…Also, we have found that velocity is positive for ω ≥ −0.5 and negative for phantom energy (ω < Figure 3 shows the rate of change of RBH mass for different value of ω. In this case, the profile of accreting mass of nonminimal RBH is similar to the profile for charged BH in string theory [41], which shows that the mass of RBH as a result of accretion of dust, stiff and quintessence matter increases and reverse case will be occur for phantom energy.…”

Section: Nonminimal Magnetically Charged Rbhsupporting

confidence: 58%

“…The positivity and negativity of (ϱ + p) describes the increase and decrease in mass of BH. It is shown that during accretion mechanism outside the BH mass will increase, while in Hawking radiation BH mass decreases for fluid like phantom dark energy [41].…”

Section: Formalism For Accretionmentioning

confidence: 99%

“…In this work, we have used the formalism of accretion onto nonminimal magnetically charged BH, which has been analyzed by Bahamonde and Jamil [41] for regular BHs. We analyzed the consequences of regular BH mass for different values ω.…”

Section: Introductionmentioning

confidence: 99%

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Accretion onto Regular Magnetic Black Hole in Non-minimal Einstein-Yang-Mills Theory

Aslam¹,

Bhar²

2017

Open J. Math. Sci.

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Abstract. In this work, we investigate the process of accretion for static spherical symmetric geometries for isotropic fluid. For analyze this process we use the nonminimal magnetically charged regular black holes. For this purpose, we obtain generalized expressions for the accretion rateṀ , critical radius rs, critical speed v 2 s and squared sound speed c 2 s during the accretion process near the regular black holes. Finally, we study the behavior of radial velocity, energy density and rate of change of mass for each regular black hole by plotting graph.

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Section: Nonminimal Magnetically Charged Rbhsupporting

confidence: 83%

Section: Nonminimal Magnetically Charged Rbhsupporting

confidence: 58%

Section: Formalism For Accretionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Accretion onto Regular Magnetic Black Hole in Non-minimal Einstein-Yang-Mills Theory

Aslam¹,

Bhar²

2017

Open J. Math. Sci.

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“…This process may be described by a perfect fluid coupled to general relativity representing a plasma which obeys the equations of ideal or resistive magnetohydrodynamics or a fluid coupled to radiation. Such accretion processes along with their detailed physical descriptions, can be found in [67] and references therein, see also [68][69][70][71][72][73][74][75]. On the other hand, there are also other kind of accretion processes related to the black holes surrounded by exotic matter fields as potential models of dark energy, whose existence and features are motivated by the problems in the standard model of cosmology.…”

Section: Introductionmentioning

confidence: 99%

Surrounded Vaidya solution by cosmological fields

Heydarzade

Darabi

2018

Eur. Phys. J. C

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In the present work, we study the general surrounded Vaidya solution by the various cosmological fields and its nature describing the possibility of the formation of naked singularities or black holes. Motivated by the fact that real astrophysical black holes as non-stationary and nonisolated objects are living in non-empty backgrounds, we focus on the black hole subclasses of this general solution describing a dynamical evaporating-accreting black holes in the dynamical cosmological backgrounds of dust, radiation, quintessence, cosmological constant-like and phantom fields, the so called "surrounded Vaidya black hole". Then, we analyze the timelike geodesics associated with the obtained surrounded black holes and we find that some new correction terms arise relative to the case of Schwarzschild black hole. Also, we address some of the subclasses of the obtained surrounded black hole solution for both dynamical and stationary limits. Moreover, we classify the obtained solutions according to their behaviors under imposing the positive energy condition and discuss how this condition imposes some severe and important restrictions on the black hole and its background field dynamics.

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Particle Dynamics and Matter Accretion onto Non‐linear Charged AdS Black Holes in Massive Gravity

Malik,

Shahzad

2024

Fortschritte der Physik

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This article investigates the dynamics of charged particles and accretion process around nonlinear charged AdS black holes (BHs). the impact of key factors such as angular momentum, specific energy, and magnetic field on the behavior of particles are focused. Firstly, the concept of the effective potential is examined, which provides insights into the forces acting on particles and the escape velocity they must overcome. The innermost stable circular orbit (ISCO) is also discussed, which is the closest distance a particle can orbit a BH without being pulled in and explore the conditions for particle escape. Next, the energy efficiency and epicyclic frequency of test particles are studied, which measure the amount of energy particle loses due to friction and the frequency of its oscillations, respectively. The accretion processes is analyzed by examining the radial velocity, energy density, and accretion mass of matter falling into the BH. Using the equation of state, how different types of fluid, such as stiff, dust, quintessence and phantom‐like dark energy fluid, affect the accretion process near a BH is investigated. Throughout this study, the parameter plays a key role in shaping the dynamics of particles and accretion systems is found. This parameter is a measure of the strength of the nonlinear electrodynamics field, and it can have a significant impact on the radius of the ISCO, the energy efficiency of accretion, and other properties. These findings provide new insights into the physics of particle dynamics around nonlinear charged AdS BHs. They could have implications for understanding the behavior of matter in extreme gravitational environments, such as those found near the center of galaxies.

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Accretion processes for general spherically symmetric compact objects

Cited by 51 publications

References 38 publications

Accretion onto Regular Magnetic Black Hole in Non-minimal Einstein-Yang-Mills Theory

Accretion onto Regular Magnetic Black Hole in Non-minimal Einstein-Yang-Mills Theory

Surrounded Vaidya solution by cosmological fields

Particle Dynamics and Matter Accretion onto Non‐linear Charged AdS Black Holes in Massive Gravity

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